
# FIXME: For OS X, need flag for Framework or dylib
IF(DYNAMIC_OPENSCENEGRAPH)
    ADD_DEFINITIONS(-DOSGVIEWER_LIBRARY)
ELSE()
    ADD_DEFINITIONS(-DOSG_LIBRARY_STATIC)
ENDIF()

SET(LIB_NAME osgViewer)

SET(HEADER_PATH ${OpenSceneGraph_SOURCE_DIR}/include/${LIB_NAME})
SET(LIB_PUBLIC_HEADERS
    ${HEADER_PATH}/CompositeViewer
    ${HEADER_PATH}/Export
    ${HEADER_PATH}/GraphicsWindow
    ${HEADER_PATH}/Renderer
    ${HEADER_PATH}/Scene
    ${HEADER_PATH}/Version
    ${HEADER_PATH}/View
    ${HEADER_PATH}/Viewer
    ${HEADER_PATH}/ViewerBase
    ${HEADER_PATH}/ViewerEventHandlers
)

SET(LIB_COMMON_FILES
    CompositeViewer.cpp
    HelpHandler.cpp
    Renderer.cpp
    Scene.cpp
    ScreenCaptureHandler.cpp
    StatsHandler.cpp
    Version.cpp
    View.cpp
    Viewer.cpp
    ViewerBase.cpp
    ViewerEventHandlers.cpp
    ${OPENSCENEGRAPH_VERSIONINFO_RC}
)

SET(LIB_EXTRA_LIBS)

IF(WIN32)
    #
    # Enable workaround for OpenGL driver issues when used in multithreaded/multiscreen with NVidia drivers on Windows XP 
    # For example: osgviewer dumptruck.osg was showing total garbage (screen looked like shattered, splashed hedgehog) 
    # There were also serious issues with render to texture cameras.
    # Workaround repeats makeCurrentContext call as it was found that this causes the problems to dissapear.
    #
    OPTION(OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND "Set to ON if you have NVidia board and drivers earlier than 177.92 ver" OFF)
    MARK_AS_ADVANCED(OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND)
    IF(OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND)
        ADD_DEFINITIONS(-DOSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND)
    ENDIF()

    SET(LIB_PUBLIC_HEADERS ${LIB_PUBLIC_HEADERS}
        ${HEADER_PATH}/api/Win32/GraphicsWindowWin32
        ${HEADER_PATH}/api/Win32/PixelBufferWin32
    )
        
    SET(LIB_COMMON_FILES ${LIB_COMMON_FILES} 
        GraphicsWindowWin32.cpp
        PixelBufferWin32.cpp
    )
ELSE()
    IF(APPLE)
        SET(OSG_WINDOWING_SYSTEM "Carbon" CACHE STRING "Windowing system type for graphics window creation, options Carbon, Cocoa or X11.")
    ELSE()
        SET(OSG_WINDOWING_SYSTEM "X11" CACHE STRING "Windowing system type for graphics window creation. options only X11")
    ENDIF()
    
    IF(${OSG_WINDOWING_SYSTEM} STREQUAL "Cocoa")
        ADD_DEFINITIONS(-DUSE_DARWIN_COCOA_IMPLEMENTATION)
        SET(LIB_PUBLIC_HEADERS ${LIB_PUBLIC_HEADERS} 
            ${HEADER_PATH}/api/Cocoa/GraphicsWindowCocoa
            ${HEADER_PATH}/api/Cocoa/PixelBufferCocoa
        )
        SET(LIB_COMMON_FILES ${LIB_COMMON_FILES} 
            GraphicsWindowCocoa.mm
            DarwinUtils.h
            DarwinUtils.mm
            PixelBufferCocoa.mm
        )
    SET(LIB_EXTRA_LIBS ${COCOA_LIBRARY} ${LIB_EXTRA_LIBS})
    ELSEIF(${OSG_WINDOWING_SYSTEM} STREQUAL "Carbon")
        ADD_DEFINITIONS(-DUSE_DARWIN_CARBON_IMPLEMENTATION)
        SET(LIB_PUBLIC_HEADERS ${LIB_PUBLIC_HEADERS} 
            ${HEADER_PATH}/api/Carbon/GraphicsWindowCarbon
            ${HEADER_PATH}/api/Carbon/PixelBufferCarbon
        )
        SET(LIB_COMMON_FILES ${LIB_COMMON_FILES} 
            GraphicsWindowCarbon.cpp
            DarwinUtils.h
            DarwinUtils.mm
            PixelBufferCarbon.cpp
        )
        SET(LIB_EXTRA_LIBS ${COCOA_LIBRARY} ${LIB_EXTRA_LIBS})
    ELSE()
        # X11 for everybody else
        INCLUDE(FindPkgConfig OPTIONAL)
        IF(PKG_CONFIG_FOUND)
            PKG_CHECK_MODULES(XRANDR xrandr)
            IF(XRANDR_FOUND) 
                OPTION(OSGVIEWER_USE_XRANDR "Set to ON to enable Xrandr support for GraphicsWindowX11." ON)
            ELSE() 
                SET(OSGVIEWER_USE_XRANDR OFF)
            ENDIF()
        ELSE()
            SET(OSGVIEWER_USE_XRANDR OFF)
        ENDIF()

        SET(LIB_PUBLIC_HEADERS ${LIB_PUBLIC_HEADERS}
            ${HEADER_PATH}/api/X11/GraphicsWindowX11
            ${HEADER_PATH}/api/X11/PixelBufferX11
        )

        SET(LIB_COMMON_FILES ${LIB_COMMON_FILES} 
            GraphicsWindowX11.cpp 
            PixelBufferX11.cpp
        )

        IF(OSGVIEWER_USE_XRANDR)
            ADD_DEFINITIONS(-DOSGVIEWER_USE_XRANDR)
            SET(LIB_PRIVATE_HEADERS ${LIB_PRIVATE_HEADERS} ${XRANDR_INCLUDE_DIRS} )

            IF(X11_Xrandr_LIB)
                SET(LIB_EXTRA_LIBS ${X11_Xrandr_LIB} ${LIB_EXTRA_LIBS})
            ELSE()
                SET(LIB_EXTRA_LIBS ${XRANDR_LIBRARIES} ${LIB_EXTRA_LIBS})
            ENDIF()
        ENDIF()

        # X11 on Apple requires X11 library plus OpenGL linking hack on Leopard
        IF(APPLE)
            # Find GL/glx.h 
            IF(EXISTS ${CMAKE_OSX_SYSROOT}/usr/X11/include/GL/glx.h)
                SET(OPENGL_INCLUDE_DIR /usr/X11/include)
                SET(OPENGL_LIBRARIES /usr/X11/lib/libGL.dylib)
            ELSEIF(EXISTS ${CMAKE_OSX_SYSROOT}/usr/X11R6/include/GL/glx.h)
                SET(OPENGL_INCLUDE_DIR /usr/X11R6/include)
                SET(OPENGL_LIBRARIES /usr/X11R6/lib/libGL.dylib)
            ENDIF()
            INCLUDE_DIRECTORIES(BEFORE SYSTEM ${OPENGL_INCLUDE_DIR})

            SET(LIB_EXTRA_LIBS ${X11_X11_LIB} ${OPENGL_LIBRARIES} ${LIB_EXTRA_LIBS})
            SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:${CMAKE_OSX_SYSROOT}/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib")
        ENDIF(APPLE)
    ENDIF()
ENDIF()


ADD_LIBRARY(${LIB_NAME}
    ${OPENSCENEGRAPH_USER_DEFINED_DYNAMIC_OR_STATIC}
    ${LIB_PUBLIC_HEADERS}
    ${LIB_PRIVATE_HEADERS}
    ${LIB_COMMON_FILES}
)


LINK_INTERNAL(${LIB_NAME}     
    osgGA
    osgText
    osgDB
    osgUtil
    osg
    OpenThreads
)

LINK_EXTERNAL(${LIB_NAME} ${LIB_EXTRA_LIBS})

LINK_CORELIB_DEFAULT(${LIB_NAME})

IF(MINGW OR CYGWIN)
    LINK_EXTERNAL(${LIB_NAME} gdi32 )
ENDIF()

INCLUDE(ModuleInstall OPTIONAL)

FOREACH(INCLUDEFILE ${LIB_PUBLIC_HEADERS} )
   FILE(RELATIVE_PATH REL_INCLUDEFILE ${HEADER_PATH} ${INCLUDEFILE})
   GET_FILENAME_COMPONENT(REL_INCLUDE_PATH ${REL_INCLUDEFILE} PATH)
   INSTALL(
   FILES        ${INCLUDEFILE}
   DESTINATION ${INSTALL_INCDIR}/${LIB_NAME}/${REL_INCLUDE_PATH}
   COMPONENT libopenscenegraph-dev
   )
ENDFOREACH()
